erupted, killing 62-year-old. will list -- police arrested the gunman. he was committed to a psychiatric institution. >> my mind is always thinking what if. and the what ifs, quite honestly, is a low, keep your loved ones down. as soon as you hear the sound of gunfire or anything like that, you really have to of a game plan established. hunkering down, staying on the ground, not making any sounds or whatever may be the case, and trying to, again, decide what is your next move going to be. if you have to think about it, it's too late. >> these events should also cause business owners to take a hard look at their security measures. >> the first order of business is safety.